Title from title screen (viewed on Sept. 12, 2003). "November 1997." "EPA/600/SR-97/115."
System requirements: Adobe Acrobat Reader required. Mode of access: Internet from the EPA Office of Research and Development web site. Address as of 9/12/2003: http://www.epa.gov/ORD/WebPubs/projsum/600sr97115. pdf; current access available via PURL.